About three years ago I bought a Schwinn Trailways 700C Hybrid. I knew it wasn't an awesome bike, but I couldn't afford more and it was perfect for the kind of riding I was looking to do (around the neighborhood and nearby trails). After that first year I used it occasionally, always pleased with its performance. About a month ago I stopped using my car and started using my bike for all of my commuting needs. Again, still very pleased with the bike.
I would like to participate in a 42 mile ride around a lake in September. I can afford to put a little money into the Schwinn to get it in top condition, but I can't afford to buy a road bike at this point. Do you think there's anyway a bike like mine can do that kind of ride? Other than tune ups and adjustments, what should I have done? Can I switch out the hybrid tires for road tires?